GA small aircraft non adherence to clearance through the bos TCA.

Attributes
ACN	162908
Time
Date	199011
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : bos
State Reference	MA
Altitude	msl bound lower : 2500 msl bound upper : 3500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bos
Operator	general aviation : instructional
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	None
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	pilot : cfi pilot : instrument pilot : commercial
Experience	flight time last 90 days : 180 flight time total : 2550 flight time type : 10
ASRS Report	162908
Person 2
Affiliation	Other
Function	instruction : trainee
Qualification	pilot : student
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Training x-country phase. Student was navigating VFR sebnd through the bos TCA with clearance through the TCA to remain 15 mi southeast of bos. When the flight was approximately 8 mi north of norwood, ma, I instructed the student to divert to minuteman airport. The divert required a change in course of about 180 degree. As the student turned on the new course and began a VFR descent to 2500' the controller called requesting our new heading. I responded that we were beginning a divert to minuteman and were descending. He replied negative climb maintain 3500' for traffic. After clearing traffic we were cleared on course at requested altitude. To summarize, my inaction to call prior to the divert was inappropriate even though we were VFR. The delay in the call, however, was only 1-2 mins. The controllers excited response to our heading was understandable. Next time the call will come first.

Original NASA ASRS Text

Title: GA SMA NON ADHERENCE TO CLRNC THROUGH THE BOS TCA.

Narrative: TRNING X-COUNTRY PHASE. STUDENT WAS NAVIGATING VFR SEBND THROUGH THE BOS TCA WITH CLRNC THROUGH THE TCA TO REMAIN 15 MI SE OF BOS. WHEN THE FLT WAS APPROX 8 MI N OF NORWOOD, MA, I INSTRUCTED THE STUDENT TO DIVERT TO MINUTEMAN ARPT. THE DIVERT REQUIRED A CHANGE IN COURSE OF ABOUT 180 DEG. AS THE STUDENT TURNED ON THE NEW COURSE AND BEGAN A VFR DSNT TO 2500' THE CTLR CALLED REQUESTING OUR NEW HDG. I RESPONDED THAT WE WERE BEGINNING A DIVERT TO MINUTEMAN AND WERE DSNDING. HE REPLIED NEGATIVE CLB MAINTAIN 3500' FOR TFC. AFTER CLRING TFC WE WERE CLRED ON COURSE AT REQUESTED ALT. TO SUMMARIZE, MY INACTION TO CALL PRIOR TO THE DIVERT WAS INAPPROPRIATE EVEN THOUGH WE WERE VFR. THE DELAY IN THE CALL, HOWEVER, WAS ONLY 1-2 MINS. THE CTLRS EXCITED RESPONSE TO OUR HDG WAS UNDERSTANDABLE. NEXT TIME THE CALL WILL COME FIRST.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.